diff --git a/src/generator/template-registry.ts b/src/generator/template-registry.ts
index 770555b..7bd7882 100644
--- a/src/generator/template-registry.ts
+++ b/src/generator/template-registry.ts
@@ -52,7 +52,7 @@ export function getTemplate(templateId: string): TemplateMetadata {
 
   if (!template) {
     throw new ValidationCliError(
-      `Unknown template '${templateId}'. Supported templates: ${TEMPLATE_IDS.join(', ')}.`,
+      `The requested template is not supported. Supported templates: ${TEMPLATE_IDS.join(', ')}.`,
     );
   }
 
diff --git a/src/generator/template-sources.ts b/src/generator/template-sources.ts
index 7ea8446..223b7b8 100644
--- a/src/generator/template-sources.ts
+++ b/src/generator/template-sources.ts
@@ -16,7 +16,7 @@ export function resolveBundledTemplateRoot(templateId: string): string {
 
   if (directory === undefined) {
     throw new ValidationCliError(
-      `Template '${templateId}' is registered but is not bundled in this CLI version yet.`,
+      'The selected template is not available in this CLI version.',
     );
   }
 
diff --git a/src/generator/validation.ts b/src/generator/validation.ts
index a397ead..b0f2af6 100644
--- a/src/generator/validation.ts
+++ b/src/generator/validation.ts
@@ -110,7 +110,7 @@ export function planProjectDestination(
   if (fileSystem.exists(destination)) {
     if (!fileSystem.isDirectory(destination)) {
       throw new ValidationCliError(
-        `Destination already exists and is not a directory: ${destination}`,
+        `Destination already exists and is not a directory: ${destination}.`,
       );
     }